ISC (Commerce)
ISC (Arts)
ISC (Science)
Academic Year: 2013-2014
Date: March 2014
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Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, formic acid, decreases, less, zero, small, paired, atoms, unpaired, ions, pentagonal bipyramidal, electrical, more, ethylamine, molecules, propanoic acid, methylamine, chemical)
An electrochemical cell converts ________ energy to _________ energy.
Chapter: [0.066] Corrosion
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, formic acid, decreases, less, zero, small, paired, atoms, unpaired, ions, pentagonal bipyramidal, electrical, more, ethylamine, molecules, propanoic acid, methylamine, chemical.)
The crystal of graphite is made-up of ________ while that of sodium chloride is made-up of _______.
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, formic acid, decreases, less, zero, small, paired, atoms, unpaired, ions, pentagonal bipyramidal, electrical, more, ethylamine, molecules, propanoic acid, methylamine, chemical.)
Ethyl isocyanide, on hydrolysis with dilute sulphuric acid, gives ______ and _______.
Chapter: [0.141] Carboxylic acids
The molar conductance of a solution _______ with dilution, while its specific conductance _______ with dilution.
increases
formic acid
decreases
less
zero
small
paired
atoms
unpaired
ions
pentagonal bipyramidal
electrical
more
ethylamine
molecules
propanoic acid
methylamine
chemical
Chapter: [0.064] Electrolytic conductance
Fill in the blanks by choosing the appropriate word/words from those given in the brackets:
(increases, formic acid, decreases, less, zero, small, paired, atoms, unpaired, ions, pentagonal bipyramidal, electrical, more, ethylamine, molecules, propanoic acid, methylamine, chemical.)
The Van’t Hoff factor of the acetic acid solution is _______ than one and the value of a normal colligative property is ________ than the observed colligative property of this solution.
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
Complete the following statement by selecting the correct alternative from the choices given:
Of the following terms used for denoting the concentration of a solution, the one which does not get affected by temperature is: ______
Molarity
Molality
Normality
Formality
Chapter: [0.015] Normality, molality
Complete the following statement by selecting the correct alternative from the choices given:
The solubility of calcium hydroxide is s mol litre-1. The solubility product under the same condition will be: _________.
4s3
2s3
2s2
s3
Chapter: [0.055] Solubility product and its applications
Complete the following statement by selecting the correct alternative from the choices given:
A current liberates 0.50 g of hydrogen in 2 hours. The weight of copper (at. wt. = 63.5) deposited at the same time by the same current through copper sulphate solution is: ___________
63.5 g
31.8 g
15.9 g
15.5 g
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
Complete the following statement by selecting the correct alternative from the choices given:
Natural rubber is a : _________
Polyester
Polyamide
Polyisoprene
Polysaccharide
Chapter: [0.16] Polymers
Complete the following statement by selecting the correct alternative from the choices given:
Among the following halogens, the one which does not form an oxyacid is _________.
Fluorine
Chlorine
Bromine
Iodine
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
What is the [OH–] concentration of an acid whose pH is 5 at 25°C?
Chapter: [0.052000000000000005] Ionic product of water, pH of solutions and pH indicators
What happens when a nickel rod is dipped into a copper sulphate solution? Justify your answer.
`[E_((Ni^(+2))/(Ni))^0 = -0.25"v" and E _(("Cu"^(+2))/("Cu"))^0 = +0.34"v"]`
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
Write the equation for the preparation of acetanilide from aniline.
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
Define Raoult’s law for the elevation of the boiling point of a solution.
Chapter: [0.011000000000000001] Raoult's law and colligative properties
An ionic compound is made-up of A cations and B anions. If A cations are present at the alternate comers and B anion is present on the body of the diagonal, what is the formula of the ionic compound?
Chapter: [0.052000000000000005] Ionic product of water, pH of solutions and pH indicators
Match the following:
| (i) Molal depression constant | (a) Infinite dilution |
| (ii) Acetaldehyde | (b) mol L-1 sec-1 |
| (iii) Rate of reaction | (c) Iodoform |
| (iv) Optical activity | (d) K kg mol-1 |
| (v) Kohlrausch’s law | (e) Lactic acid |
Chapter: [0.131] Carbonyl compounds
What will be the vapour pressure of a solution containing 5 moles of sucrose (C12H22O11) in 1 kg of water, if the vapour pressure of pure water is 4.57 mm of Hg? [C = 12, H = 1, O = 16]
Chapter: [0.011000000000000001] Raoult's law and colligative properties
A 2 molal solution of sodium chloride in water causes an elevation in the boiling point of water by 1.88 K. What is the value of Van’t Hoff factor? What does it signify? [Kb = 0.52 K kg mol-1]
Chapter: [0.013000000000000001] Relative molecular mass of non-volatile substances
(i)
Write the mathematical expression relating to the variation of the rate constant of a reaction with temperature.
(ii)
How can you graphically find the activation energy of the reaction from the above expression?
(iii)
The slope of the line in the graph of log k (k = rate constant) versus `1/"T"` is -5841. Calculate the activation energy of the reaction.
Chapter: [0.0301] Order of a reaction
Define the Frenkel defect in a solid crystal.
Chapter: [0.02] States of Matters: Structure and Properties Solid State
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Ionic solids conduct electricity in the molten state, but not in solid-state.
Chapter: [0.02] States of Matters: Structure and Properties Solid State
A solution of sodium chloride has no effect on litmus, but a solution of zinc chloride turns blue litmus red.
Chapter: [0.141] Carboxylic acids
In a crystal of diamond:
(i) How many carbon atoms are present per unit cell?
(ii) What type of lattice does diamond crystallize in?
(iii) How many carbon atoms surround each carbon atom?
(iv) How are they arranged?
Chapter: [0.02] States of Matters: Structure and Properties Solid State
What is standard hydrogen electrode?
Chapter: [0.062] Galvanic cells, mechanism of current production in a galvanic cell;
0.05 M NaOH solution offered resistance of 31.6 ohms in a conductivity cell at 298 K. If the cell constant of the cell is 0.367 cm-1, calculate the molar conductivity of the NaOH solution.
Chapter: [0.064] Electrolytic conductance
Kc for the reaction is 61.7 at 60°C. What is its unit? Calculate Kp for the reaction and write its unit.
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
What happens to the equilibrium in a reversible reaction if a catalyst is added to it?
Chapter: [0.040999999999999995] Reversible reactions and dynamic equilibrium
State the effect of the following on the reaction
\[\ce{2SO2_{(g)} + O2_{(g)} ⇌ 2SO3_{(g)} + 189.4}\]kJ at equilibrium:
(i) Temperature is increased.
(ii) The concentration of SO2 is increased.
(iii) The pressure is decreased.
(iv) Helium is added at constant pressure.
Chapter: [0.042] Le Chatelier’s Principle and its applications to chemical equilibria
0.3605 g of a metal is deposited on the electrode bypassing 1.2 amperes of current for 15 minutes through its salt solution. The atomic weight of the metal is 96. What is the valency of the metal?
Chapter: [0.02] States of Matters: Structure and Properties Solid State
Explain why phenolphthalein is used as an indicator of acid-base titration.
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
Write the formula of the following compound:
Triammine triaquachromium (III) chloride
Chapter: [0.114] Chlorobenzene
Write the formula of the following compound:
Potassiumhexacyanoferrate(III)
Chapter: [0.114] Chlorobenzene
Name the type of isomerism shown by the following pair of compounds:
[CoCl(H2O)(NH3)4]Cl2 and [CoCl2(NH3)4]Cl.H2O
Chapter: [0.07] Coordination Compounds
Name the type of isomerism shown by the following pair of compound:
[Pt(NH3)4] [PtCl6] and [Pt(NH3)4Cl2] [PtCl4]
Chapter: [0.07] Coordination Compounds
For the complexion of [Co(NH3)6]3+:
(i) State the hybridisation of the complex.
(ii) State the magnetic nature of the complex.
Chapter: [0.07] Coordination Compounds
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Write a balanced chemical equation for the following reaction:
Ozone and lead sulphide.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18 [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
Write a balanced chemical equation for the following reaction:
Chlorine is passed through hot concentrated NaOH solution.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
Write a balanced chemical equation for the following reaction:
Sulphuric acid is treated with phosphorous.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18 [0.09] Preparation/ Manufacture, Properties and Uses of Compounds of Groups 16, 17, – Ozone, Sulphur Dioxide, Sulphuric Acid, Hydrochloric Acid
Give a reason for the following:
Zn+2 salts are white but Cu2+ salts are blue in colour.
Chapter: [0.051] Arrhenius, Brönsted-Lowry and Lewis concept of acids and bases
Give a reason for the following:
Fluorine gives only one oxide but chlorine gives a series of oxides.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
How is potassium dichromate prepared from a sample of chromite ore? Give balanced equations for the chemical reactions involved.
Chapter: [0.1] Chemistry of Transition and Inner-Transition Elements: d-Block: 3d, 4d and 5d series f-Block: 4f and 5f series
For the molecule IF7 :
(i) Draw the structure of the molecule.
(ii) State the hybridisation of the central atom.
(iii) State the geometry of the molecule.
Chapter: [0.08] Chemistry of p-Block Elements: Group 16, 17, 18
How can the following conversions be brought about:
(i) Acetic acid to methyl cyanide.
(ii) Acetaldehyde to formaldehyde.
(iii) Nitrobenzene to 2, 4, 6 tribromoaniline.
Chapter: [0.141] Carboxylic acids
Identify the reagents A, B, C, D, E and F required for the following conversion:
\[\ce{C6H5NO2->[A]C6H5NH2->[B]C6H5N2+Cl- ->[C]C6H5Cl->[D]C6H5OH->[H2SO4]E + F}\]
Chapter: [0.141] Carboxylic acids
The deficiency of which vitamin will cause the following diseases:
(i) Scurvy
(ii) Haemorrhages
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Give one chemical test to distinguish between the following pairs of compounds:
(i) Ethanol and 2 propanols.
(ii) Aniline and ethylamine.
Chapter: [0.142] Acid derivatives
Write the structures of all enantiomers possible for lactic acid.
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Give balanced equations for the following reactions:
(i) Acetaldehyde is heated with hydroiodic acid in the presence of red phosphorous.
(ii) Calcium acetate is subjected to dry distillation.
(iii) Sodium ethoxide is treated with ethyl bromide.
(iv) Benzaldehyde is treated with sodium bisulphite.
Chapter: [0.131] Carbonyl compounds
An organic compound A with the molecular formula C7H8 on oxidation by chromyl chloride in the presence of CCl4 gives a compound B which gives positive tollen’s test. The compound B on treatment with NaOH followed by acid hydrolysis gives two products C and D. C on oxidation gives B which on further oxidation gives D. The compound D on distillation with soda-lime gives a hydrocarbon E. Below 60°C, concentrated nitric acid reacts with E in the presence of concentrated sulphuric acid forming a compound F. Identify the compounds A, B, C, D, E, and F.
Chapter: [0.141] Carboxylic acids [0.142] Acid derivatives
Give a balanced equation for the following name reaction:
Clemmensen’s reduction.
Chapter: [0.131] Carbonyl compounds
Give a balanced equation for the following name reaction:
Kolbe’s electrolytic reaction.
Chapter: [0.141] Carboxylic acids [0.141] Carboxylic acids
Give a balanced equation for the following name reaction:
Balz-Schiemann’s reaction
Chapter: [0.15] Cyanides, Isocyanides, Nitro compounds, Amines and Diazonium Salt
What do you observe when glucose is treated with bromine water?
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
What is the isoelectric point?
Chapter: [0.17] Biomolecules – carbohydrates, proteins, enzymes, vitamins and nucleic acids
Answer the following:
(i) What is biuret test?
(ii) Write a balanced equation for the formation of biuret.
Chapter: [0.142] Acid derivatives
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